Gabi Braun (Ayane Sakura/Lindsay Seidel) is introduced early in the Final Season of "Attack on Titan" as a promising member of the latest batch of Warriors. With her fierce anger and hatred for the enemy, she becomes something of a dark mirror to protagonist Eren Jaeger (Yuki Kaji/Bryce Papenbrook).
On the r/attackontitan subreddit, u/GrumbleMumble1 had particularly high praise for the character and how she is written. "I was a part of the hate train of Gabi ever since she killed Sasha. ... Then, the last few episodes made me rethink her entire character," the user explained in their thread. "Honestly, Gabi is one of the best written characters in this entire anime. She really shows what brainwashing and corruption can do to a person."
Raised as part of a family with a history of military service, Gabi aspires to live up to Reiner's example as a Warrior and never even thinks to question the propaganda she is fed from a young age. However, after she meets the family of someone she killed, she begins to see through the lies about the enemy being unfeeling devils.
u/illEagle96 also had high praise for the handling of the character, pointing out how her story "portrays the mindset of child soldiers, brainwashing propaganda and nationalism." u/udithsethu doubled down further, saying, "Gabi is probably a top 5 best written AOT character."